Open Source Release
35 lines
1.2 KiB
Go
35 lines
1.2 KiB
Go
// Package dbutil holds small helpers shared by the handler packages that
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// talk to Postgres via pgx — kept minimal since this is a 3-handler app,
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// not a reason to build a data-access layer.
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package dbutil
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import "strings"
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// NullIfEmpty converts an empty string to nil so COALESCE/optional columns
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// stay unset rather than being overwritten with "".
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func NullIfEmpty(s string) interface{} {
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if s == "" {
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return nil
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}
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return s
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}
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// IsFKViolation reports whether err is a Postgres foreign-key violation —
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// checked by message substring since the handler packages don't otherwise
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// depend on pgconn's error types.
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func IsFKViolation(err error) bool {
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return err != nil && strings.Contains(err.Error(), "violates foreign key constraint")
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}
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// IsUniqueViolation reports whether err is a Postgres unique-constraint
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// violation, same message-substring approach as IsFKViolation.
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func IsUniqueViolation(err error) bool {
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return err != nil && strings.Contains(err.Error(), "violates unique constraint")
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}
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// IsCheckViolation reports whether err is a Postgres CHECK-constraint
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// violation, same message-substring approach as IsFKViolation.
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func IsCheckViolation(err error) bool {
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return err != nil && strings.Contains(err.Error(), "violates check constraint")
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}
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